te 
Geology. t 119 
8vo, pp. 333-498,.—These two divisions of the Report of the Kentucky 
Geological Survey, have reached us in advance of publication, thanks to 
the kind attentions of Dr. Peter, who, since the death of the lamented 
Owen, is charged with the publication of the work. r. Lesquereux 
here presents the results of his critical studies into the distribution of the 
fossil plants of the coal strata, in the various coal beds, confirming the 
in the different coal fields of Kentucky (as far as his observations have 
extended) with those of other parts of North America. TI 
a great desideratum in American geology, and no observer has enjoyed 
greater opportunities for exact study in this line of research or has pos- 
sessed in so eminent a degree the peculiar knowledge which is essential 
to a correct solution of the problem. 
_ Mr. Lesquereux does not recognize the justness of the division which 
1s often made between the upper and lower Coal measures, i. e., those 
“above from those below the conglomerate, and sees no good reasons for 
calling the latter ‘false coal measures.’ ‘If? he says, ‘it is based on the 
fact that the interior coal beds are not generally found over the whole 
extent of the coal fields of America, the same can be said of the coal strata 
between the Mahoning and the Anvil Rock Sandstone, and particularly of 
the upper coal measures above the Anvil Rock. If this separation is 
made, trom the thickness and extent of the great deposit of aga 
] 
z 
fa] 
3 
is3) 
5 
° 
=, 
o 
o 
® 
pb 
P| 
a 
a 
° 
oO 
Ke 
¥ 
es 
oe 
a 
oe 
° 
S 
c 
7 
= 
n 
oO 
~ 
+ 
>) 
Ss. 
° 
= 
ah 
o 
“e 
2 
te. 
‘2. The measures between the conglomerate and the Mahoning sand- 
*3. Those between this last sandstone and the Anvil Rock. 
‘4. The upper coal measures above it, with their top still undeter- 
rest to 
as perfectly reliable, and of which I have been able to compare the palze- 
ontological characters, at least at some of their principal horizons. 
* All the coal beds, the position of which has been ascertained by such palson- 
tological evidence, are igh beet by a (*). = 
